//
//  NSObject+KVO.h
//  KVO
//
//  Created by 徐凯 on 2018/12/30.
//  Copyright © 2018 徐凯. All rights reserved.
//

#import <Foundation/Foundation.h>
#import"Student.h"
NS_ASSUME_NONNULL_BEGIN

@interface Student (KVO)
-(void)XK_addObserver:(NSObject *)observer forKeyPath:(NSString *)keyPath options:(NSKeyValueObservingOptions)options context:(void *)context;
@end

NS_ASSUME_NONNULL_END
